@glpsace. One brand: Audio GD. Starting from R2R-11Mk2 combo DAC plus preamp/HPA, fully discrete non-feedback design. No opamps.
There is an option for better oscilators and galvanic isolator on the USB port. It brings price to $690. It won't deliver peak performance, but it will perform consistently in various configurations.
A basic option costs $70 less, but it will require attention to ground loops, not everyone is ready for that. It could be a hit or miss. If you do, then it can also be DIY upgraded to ultra-low noise oscilators at a cost of ~$20. I did the upgrade, it bring a significant jump in sound quality. So, a low jitter oscilators are extremely important, but the entire design must work together.